SU1041294A1 - Method and apparatus for making multiple-layer extruded products - Google Patents

Description

The invention relates to the production of building products, mainly by plastic molding, and may be used in other branches of the national economy, for example, in the manufacture of articles of plastics.

A device for plastic molding of two-layer facial ceramics is known, consisting of two belt-pressing screw presses arranged perpendicularly relative to each other. One of the presses forms a timber from the main mass (base timber), and the second auxiliary productivity unit delivers the face mass to the mouthpieces of the main press 1.

In this case, the application of the face layer is carried out by injecting a mass onto the formed base bar into the cavity of SquareTVKa. In this case, insufficient bonding strength is created between the layers 11:; d (: whether, which is due to the formation of a smooth surface of the formed base bar and the presence of water or other films on the surface that form the surface section. Aa. The face layer applied to such a surface does not have a reliable contact with the material of the base beam.

The disadvantages of the operation of this installation also include uneven compaction of the face layer along the width of the product. This is due to the drop in pressure of the injected mass as it moves away from the auxiliary press’s blower.

These drawbacks significantly impair adhesion between the layers of the formed product, which leads to premature exfoliation of the face layer during operation and reduce its durability.

The aim of the invention is to increase the adhesion strength between the layers and the durability of the products.

This goal is achieved by the fact that according to the method of manufacturing multilayer extrusion products, including the formation of the main beam and the application of the apple layer to finish the formation of the main structure of the beam, simultaneously develop the developed surface of the main beam and press the mass of the face layer into it.

In the device for the manufacture of multilayer extrusion products, including the main and auxiliary extruders with angled pressing heads i, the auxiliary extruder is fixed on the pressing head of the main one, so that its working body is made in the form

rotor, stands for its annular ribs inside the press head.

FIG. 1 shows schematically a device for applying a face layer on one plane of an article; in fig. 2 - section 5A-A in FIG. one; in fig. 3 shows a device for producing multilayer extrusion products with a face layer on two mutually perpendicular planes; in fig. 4 - types of products obtained.

o The device consists of a main press fixed on its press head 2, an auxiliary press 3 with a working body in the form of a rotor with annular ribs and flanges with perforations in the form of grooves 4, a knife-slicer 5.

5 The device operates as follows.

The press head 2 is fed with the mass of the main beam. The mass of the front layer is fed into the press head by the rotor of the auxiliary press 3, while the front mass is removed by a cutting knife 5 from the annular channels of the rotor (grooves of the annular ribs 4) and under pressure is inserted into the mass of the main beam, simultaneously filling the grooves formed by the teeth

5 annular ribs of the rotor.

To obtain products with a face layer on two mutually perpendicular surfaces on the press head of the main press, two auxiliary presses are mounted in the same vertical plane.

0 with mutually perpendicular axis rotors.

Facial masses are injected until the formation of the main beam is completed while simultaneously creating a developed surface between the face and the main mass. Installing the rotor of the auxiliary press directly on the press head of the main press allows creating a pressure sufficient for diffusion penetration of the face mass into the main mass and uniform across the entire width of the product. FIG. Figure 4 shows the types of multilayer extrusion products with a face coating of one surface and two mutually perpendicular surfaces with a face coating. To obtain products with a large number of

5 layers along the length of the press head can be installed several auxiliary presses.

Thus, the use of the proposed method and device improves the adhesion strength of the layers of the product.

0 and its durability due to the formation of a developed surface and filling it with a face layer.

-.-, ,, ,,, у /, r

J 2

///////////// / / ////////////.

Surface Coating -, ed.

I9eyM coating borrowed with 1 noSepxHoc cool / n n products /

Claims (2)

1. A method of manufacturing a multilayer extrusion product, including the formation of the main beam and applying the front layer on it, characterized in that, in order to increase the adhesion strength and durability of the products, before the formation of the main structure of the beam is completed, a developed surface of the main beam is simultaneously formed in the press head and pumped in it the mass of the front layer. 2. A device for the manufacture of multilayer extrusion products, including the main and auxiliary extruders with angled press heads, characterized in that the auxiliary extruder is fixed to the press head of the main so that its working body, made in the form of a rotor, protrudes with its annular ribs inward press head.